Author: Hall Jr, Jim W | Size: 5.94 MB | Format:PDF | Quality:Original preprint | Publisher: Transportation Research Board | Year: 2009 | pages: 107 | ISBN: 9780309117920
This report presents a recommended process for determining the type of concrete pavement texture that should be used for a specific highway project. The process considers the effects of texture type on friction and noise characteristics. The report will guide pavement and construction engineers in identifying and specifying textures for concrete pavements that will provide adequate surface characteristics. The information contained in the report will be of immediate interest to state engineers and others concerned with concrete pavement design and construction.
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Guidance for the Design and Application of Shoulder and Centerline Rumble Strips
Author: Torbic, Darren John | Size: 7.30 MB | Format:PDF | Quality:Original preprint | Publisher: Transportation Research Board | Year: 2009 | pages: 181 | ISBN: 9780309117999
This report provides guidance for the design and application of shoulder and centerline rumble strips as an effective crash reduction measure, while minimizing adverse effects for motorcyclists, bicyclists, and nearby residents. Using the results of previous studies and the research conducted under this project, safety effectiveness estimates were developed for shoulder rumble strips on rural freeways and rural two-lane roads and for centerline rumble strips on rural and urban two-lane roads. The report will be of particular interest to safety practitioners with responsibility for roadway design.
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This report presents a business plan for the development of Transportation Knowledge Networks in the United States. The project builds on a number of previous Transportation Research Board activities aimed at improving access to information for transportation professionals. If successfully implemented, a decentralized, managed network of information centers will help link users to the information they need, when they need it. This report will be of interest to all transportation practitioners, managers, and executives who need more effective and efficient ways to navigate the vast pool of information resources available to them.
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Mixing and Compaction Temperatures of Asphalt Binders in Hot-Mix Asphalt
Author: West, Randy C | Size: 7.28 MB | Format:PDF | Quality:Original preprint | Publisher: Transportation Research Board | Year: 2010 | pages: 156 | ISBN: 9780309118255
This report identifies improved test methods for determining laboratory mixing and compaction temperatures of modified and unmodified asphalt binders. The report will be of immediate interest to materials engineers in state highway agencies and the hot-mix asphalt (HMA) construction industry.
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A Statistical Low Noise Model of the Earth
Silvia Castellaro and Francesco Mulargia
Seismological Research Letters, January/February 2012, v. 83, p. 39-48
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Median Intersection Design for Rural High-Speed Divided Highways
Author: Maze, T H | Size: 8.50 MB | Format:PDF | Quality:Original preprint | Publisher: Transportation Research Board | Year: 2010 | pages: 166 | ISBN: 9780309118309
This report describes common safety issues at median intersections on rural high-speed divided highways and presents innovative geometric and operational treatments for addressing those issues. Ten case studies illustrate how they have been applied in the field. The report includes recommendations for modifications to the AASHTO "A Policy on Geometric Design of Highways and Streets" (Green Book) and the "Manual on Uniform Traffic Control Devices" (MUTCD).
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Author: Lagasse, P F | Size: 12.77 MB | Format:PDF | Quality:Original preprint | Publisher: Transportation Research Board | Year: 2010 | pages: 178 | ISBN: 9780309118347
This report provides guidelines for practitioners to estimate the quantity of accumulated, flow event debris, based on the density and type of woody vegetation and river bank condition upstream and analytical procedures to quantify the effects of resulting debris-induced scour on bridge piers. The report should be of interest to bridge engineers, maintenance personnel and operations staff at state and local agencies.
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This report establishes a user's manual for the acceptance, repair, or rejection of precast/prestressed concrete girders with longitudinal web cracking. The report also proposes revisions to the AASHTO LRFD Bridge Design Specifications and provides recommendations to develop improved crack control reinforcement details for use in new girders. The material in this report will be of immediate interest to bridge engineers.
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